Sorting tables with multilevel headers

[AlKult]

Hi,

When I have sortable enabled for a table like this one, the sorting works only for the top-level headers ("Mars" and "Venus")

Is there any way to make it sort by the second level ("Produced", "Sold")?

The code that I have been experimenting with would be

<table class="sortable">
  <col>
  <colgroup span="2"></colgroup>
  <colgroup span="2"></colgroup>
  <tr>
    <td rowspan="2"></td>
    <th colspan="2" scope="colgroup">Mars</th>
    <th colspan="2" scope="colgroup">Venus</th>
  </tr>
  <tr>
    <th scope="col">Produced</th>
    <th scope="col">Sold</th>
    <th scope="col">Produced</th>
    <th scope="col">Sold</th>
  </tr>
  <tr>
    <th scope="row">Teddy Bears</th>
    <td>50,000</td>
    <td>30,000</td>
    <td>100,000</td>
    <td>80,000</td>
  </tr>
  <tr>
    <th scope="row">Board Games</th>
    <td>10,000</td>
    <td>5,000</td>
    <td>12,000</td>
    <td>9,000</td>
  </tr>
</table>

Best regards,
Albert.

[stuartlangridge]

Unfortunately, sorttable doesn't understand two-level headers at the moment. It would be possible to do so with some custom enhancements (drop me an email if that would be useful), and it's something I'd like to address in sorttable v3, but for the moment it's not supported.